3 Answers
3

Few hours ago I had no idea how to handle this, and now I have already two ways, thanks!
–
OmiodOct 23 '10 at 15:42

I've finally tested Downloadify, and it doesn't work due to the flash security sandbox. From the docs: "Important! The swf has been compiled for online use only. Testing from the file path (i.e. file:// ) will not work as it will violate the security sandbox." I can't use the Blob option too, as it works only in the latest Chrome dev versions, so for now I can't provide any export function to the extension users... :(
–
OmiodOct 30 '10 at 11:28

Well, HTML5 isn't even finished as a spec yet, let alone ready for full-scale implementation across the web. Unfortunately, HTML5 is 'the next big thing' just a bit too early. It's not surprising file writer doesn't work yet. You can always check HTML5test to see what your browser supports so far.
–
XorlevOct 23 '10 at 15:44